http://store.steampowered.com/holidaysaleEverything is at least 10% off.
All Ubisoft titles are 25% off.
Many Valve titles are 25% off, including the Complete Pack which includes their entire lineup from Half-Life to Left 4 Dead. For those who picked up Half-Life for a buck a while back, both expansions are down to a dollar each.
The id Super Pack is back down to $35 for those who missed the first time it was on sale (and Ultimate DOOM and DOOM II are just a dollar individually)
Bioshock is
five bucks.
Trackmania United Forever is down to $20.
World of Goo matches its WiiWare price of $15.
Games like Far Cry 2, Prince of Persia, Spore, Warhammer Online, and CoD4 are down to $37.50.
Fallout 3 is $40.